[Gllug] Tweaking a 3Ware 9690SA system..

[Anthony Newman]

Martyn Drake wrote:
> the best I can get from sequential block write is around 230MB/s mark,
> which seems awfully low.  The RAID 5 array has been set-up with a 64K
> stripe.  I'm using the latest driver directly from 3Ware.

It appears to be working. While testing a single stream of sequential 
data is useful to demonstrate that it is working, unless this is what 
you intend to use the device for, it is not instructive in the 
slightest. Test it in your real-life situation, or a simulation of it.

Sorry to be flippant, but I see a lot of people wasting a lot of time on 
this sort of stuff quite regularly, and unless you are seeing very poor 
performace, it's largely not worth tinkering with these settings which 
in my experience have little effect compared to, say, adding one more 
disk. If you're that close to the wire, you bought the wrong thing; and 
besides, if you wanted performance you shouldn't have chosen parity RAID. :)



Ant
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